I offended him quite unintentionally.我触犯了他完全是出于无心.The boss cannot say anything that might unintentionally be misinterpreted.老板不能说一些容易被误解的话.Albom's book does give insight into how we unintentionally affect others...

unintentionally的音标：unintentionally的英式发音音标为：[ˌʌnɪn'tenʃənəlɪ]unintentionally的美式发音音标为：[ˌʌnɪn'tenʃənəlɪ]...

adv.非故意地，非存心地，无意之中...